 In 1936 Breuer immigrated to Jerusalem, where he founded Poalei Agudat Yisrael and represented it before the Peel and Anglo American Commissions.He married Jenny Eisenmann, a granddaughter of Eliezer Liepman Philip Prins.His five children were Jacob (Bub), a lawyer who played a role in the Eichmann trial (1915–2008), Mordechai (1918–2007), Ursula (1919–2006, married Hermann Merkin), Tzipora (Tzip) Breuer Schneller (born 1926) and Simeon Breuer (1922–1943).